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New Member

Issues with VPN - ASA5520 to Sidewinder

I am having an issue where occasionally the Sidewinder starts to see my internal RFC 1918 address instead of the configured external address of my firewall. This is for peering between the two. The error they see on the Sidewinder is:

Apr  3 07:50:53 2012 MDT  f_kernel_ipsec a_vpn t_attack p_major

pid: 0 ruid: 0 euid: 0 pgid: 0 logid: 0 cmd: 'kernel'

domain: (null) edomain: (null) hostname:

category: policy_violation event: IPsec policy mismatch srcip:

dstip: protocol: 50 srcburb: ACS_VPN_Virtual interface: em12

vpn_name: ACS_VPN local_net: remote_net:

remote_id: information: ipsec:policy_mismatch:2

reason: The Sidewinder dropped an inbound IPsec packet because it does not match IPsec policy.

So instead of seeing the external peer address he sees a address. We are not sure what triggers this becuase normally he see's my address.

New Member

Issues with VPN - ASA5520 to Sidewinder

I guess the question is why does this happen? We added my internal IP to the interesting traffic on his end. Does this have anything to do with NAT-T or something to do with the identity address configured on the Sidewinder.